Improvement in gas-stoves



' S. T. MCDOUGALL.

Gas Stove. l

No. 35,769. Patented July 1, 1862.

N. PETERS. mwumugnphu, wamingmn, n.c.

UNITED STATES PATENT OFFICE.

S. T. MCDOUGALL, OF BROOKLYN, NEV YORK.

IMPROVEMENT IN GAS-STOVES.

Specification forming part of Leiters Patent No.` 35,769, dated July 1, i862.

T0 all whom may concern.-

Be it known that I, S. T. MoDoUGALL, of the city of Brooklyn, Kings county, and State of New York, haveinvented certain Improvements in Gas-Stoves; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, which form part of this specification, in which the stove and its parts are represented at half the usual size, and wherein- Figure 1 is a sectional view of the stove complete, with the burner; and Fig. 2 shows the modes of using the burner separately.

My said invention relates to gas-stoves in which the gas is mixed with atmospheric air in a small chamber, commonly called a burner, and distributed through a plate of wire-gauze or perforated metal, on the outer surface of which plate the gas thus mixed is burned; and my invention has for its object the simplifying and cheapening of the stove, while improving the efficiency and enhancing the utility and durability. A

To enable others to make and use my invention, I'will proceed" to describe its construction, operation, and mode of use.

In the drawings aunexed,wherein the marks of reference correspond in all the figures, Fig. l is a sectional diagram of the stove, with its interior parts in place all ready for use. The stove proper is made up of the base A, wall or cylinder B, breast O, and top D. The base, breast, and top are of cast metal, usually iron,

and the cylinder of sheet metal. The breast C and top D could be cast together in one piece. rIhe base A has a perforated iloor, A', in the center of which is a section of tube, E, cast therewith and projecting above and below said floor. Above a shoulder is formed on said tube to receive the burner J, and below the tube is slitted on one side to receive the supplypipe F and maintain the same in the center of the tube E. Said pipe F is secured in its place by a hook and nut, 2 3.

"The cylinder B is placed on the base A and held in position by a rim, 4. Thebreast F is rim, 7, on the underside of the top.

The breast aforesaid has the form of an annular disk,wilh a short section of tube fixed in the central opening, and, like E, extending above and below the disk. Above it serves the office of a rest, to sustain such vessels or articles-ilat-irons, for example-as are too small to rest on thetop D, and below it reaches down sufficiently near the burner to admit and direct a current of air which rises through the perforations in the floor of the base, and, passing up around the outside ofthe burner, snpplies the required oxygen to maintain the conibustion.

A series of bolts, 12, passing through the plates A G D firmly secures and holds the pari s A B G D together.

The burner employed in this stove may be of any form and construction adaptable thereto common to gas-stoves. It should be adapted in size of its lower end to the size of the tube E, over which it sits, and must be sufficiently small at the top or have such form as to permit the Vpassage up from below between it and the inside'of G of a free current of air. Said burner is, strictly speaking, a mixing-chamber for mixing atmospheric air with the gas, and thus charging it with an excess of oxygenbefore it reaches the flame, producing a perfect combustion and giving intense heat. lVith regard to form and construction, I prefer that of the burner J, consisting of a cylinder tapering toward the lower end, and having the top turned over and downward, as represented, receiving a coneshapcd cap, Q, fitted snugly thereto, and securing the perforated plate O between said cap and the top of the cylinder. The bottom part of said cylinder is flared out and curved downward or otherwise shaped, so

as to fit over the tube B. It hasa vertical tube, O, `fixed in a floor, O3, which has holes to let the air pass up, and has an auxiliary tube, O", fixed in the side of said cylinder.

The cap Q performs an important office. The perforated plate, as generally used in gasstoves, becomes heated to redness and in a very t short time burns out, requiring renewal quite often.' The use of said cap furnishes an orifice contracted to a less diameter than that of the said plate and removed a distance above it, and has the eect of raising the liame from off the plate, preserving said plate in a great degree from injury by heat, and hence greatly enhancing the durability thereof. The said cap has a east-metal crown, O5, and the cylinder has a of the latter, itis sometimes made of zine or epelter. The apertures 15 in the crown serve a similar purpose by admitting air from below. The burner on which the eap is used is not confined to any speelde form, nor is the form of 'the eap material, so long as the orifice, as aforesaid, is contracted and elevated snfoiently to produce the above effect, and the proportion ofsaid orifice to and elevation from said surface (shown in the drawings) is that adapted t0 receive the supply of gas through an ordinary five or six foot Sootehtip or bati Wing burner. i

In Fig. l the stove is seen in order for use. The gas is admitted through the snpplypipe F and escapes through a tip, 1, (a simple ap ertnre in the upper side of the tnbe will answer as WelL) into the tube E, and up into the burner J. The air also enters the tube E from below and passes up into the-,burner and is there mixed with the gas, and escapes through the perforated plate O', on the upperside of which it is lighted and burned, producing a blue llame and giving` intense heat. The eombustion is supported by a current of' air which enters the stove through the perforated floor A', and is drawn np around'the burner through the spaoe between it and the inside of the tube G.

The burner J is not permanently fastened to the stove, and may be removed andlifted out by means of a bail, which at other times falls down out of the way. vThis bail is shown dotted in l. When so removed, the said burner J may be placed on an ordinary gas-burner, the latter fitting into the tube O, as shown in full lines in Fig. 2. The dotted lines under the base of the burner J in that gure indicate a table on which the burner is adapted to be placed, if desired. In that ease the auxiliary tube O'l becomes of service, a exible tube be ing placed over it leading to any gasburner conveniently near. When the said burner J is used in stoves for heating purposes only, the orown U is not required.

The aboveinvention may be variously modified,while retaining all its essential principles. What I claim as my invention, and desire to secure by Letters Patent, isdq l: The burner J, having a contracted top, Q, with tight joints between the sides of the burner andthe circumference ofthe perforated plate O when used for heating purposes, substantially as specified. t

2. The abovedeseribed burner orits equivalent, in combination with a gassstove composed of the base A, cylinder B, breast C, and top D, substantially as described.

T. MODOUGALL- Wi t n e sses z CLINTON RoosEvnI/r, E. HARRY SMITH. 

